岩溶含水层地下水源热泵运行对地下水温度场的影响

为探究岩溶含水层水源热泵运行期间地下水温度场变化规律,以武汉市某场地地下水源热泵系统为例,基于有限元数值模拟软件FEFLOW,分别模拟了水源热泵空调制冷和制热期间抽水-回灌目的含水层中的渗流场和温度场,并对表征岩溶发育的重要参数储水系数和孔隙度进行敏感性分析。模拟结果表明,地下水源热泵运行仅影响回灌井附近地下水温度,不会对区域含水层温度产生影响;而表征岩溶发育的典型参数储水率和孔隙度,对模拟结果的影响不大。

Influence of Water Source Heat Pump on Groundwater Temperature Field in Karst Aquifer

In order to explore the characteristics of temperature field in karst aquifer during the groundwater source heat pump running, a certain site in Wuhan was taken as an example. Groundwater flow and temperature field in the pumping injection target aquifer were modeled during the refrigeration and heating period respectively, using the finite element numerical simulation software FEFLOW. Sensitivity analysis of water storage coefficient and porosity, which were two important parameters to characterize karst development, was conducted in the present study. The simulation results show that the groundwater source heat pump operation only affected the groundwater temperature near the injection well and did not affect the regional aquifer temperature. The water storage coefficient and porosity of the karst aquifer had little impact on the simulation results.